US3593823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load carriers
Assignee: Acme Steel Co
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Filing: 1968-10-11
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Granted: 1971-07-20
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Expires: 1988-10-11
Abstract
Abstract Improved load carriers for transferring articles to and from storage bins including a trolley base having a pair of vertical masts and having a lift platform located between the masts for handling the articles. A hoisting arrangement vertically moves the platform between the masts and includes a plurality of flexible hoist means. A hoist lift motor exerts a substantially equal lift force on each end of the platform through the flexible hoist means, the flexible means being trained about a series of sprockets or wheels arranged at various locations on the load carriers. The reeving arrangement of the flexible members is adjustable and an adjustable guard member is provided to prevent jumping of the flexible members.
Inventors
- 👤 Harry W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:10
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/07; B66F9/072
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
276 words
A load carrier comprising: a substantially horizontal moveable base, a pair of masts spaced from each other and extending in a substantially vertical direction from said base, a substantially rigid horizontal platform disposed between said masts and adapted to move in a vertical direction therebetween, first flexible hoist means mounted upon both of said masts and connected to one end of said platform, second flexible hoist means mounted on one of said masts and connected to the other end of said platform, drive means for moving said first and second flexible hoist means in one direction to raise said platform and in the opposite direction to lower said platform between said masts, a first wheel means rotatably mounted adjacent an end of said one mast, each of said flexible hoist means being trained about said wheel means, and said second flexible hoist means straddling said first flexible hoist means, second wheel means rotatably mounted in spaced relationship along said one mast from said first wheel means, said second wheel means comprising a first plurality of wheels and a second plurality of wheels, each of said first and second flexible hoist means being trained about ones of said first and second plurality of wheels, and means for adjustably moving said second plurality of wheels relative to said first plurality of wheels said last-mentioned means comprising cover means on said moving means upon which said second plurality of wheels are mounted, said cover means being selectively moveable relative to said first plurality of wheels and urging and maintaining each of said flexible hoist means in contact with a major portion of each of said second plurality of wheels.
Claim 2
Dependent Claim
276 words
A load carrier comprising: a substantially horizontal moveable base, a pair of masts spaced from each other and extending in a substantially vertical direction from said base, a substantially rigid horizontal platform disposed between said masts and adapted to move in a vertical direction therebetween, first flexible hoist means mounted upon both of said masts and connected to one end of said platform, second flexible hoist means mounted on one of said masts and connected to the other end of said platform, drive means for moving said first and second flexible hoist means in one direction to raise said platform and in the opposite direction to lower said platform between said masts, a first wheel means rotatably mounted adjacent an end of said one mast, each of said flexible hoist means being trained about said wheel means, and said second flexible hoist means straddling said first flexible hoist means, second wheel means rotatably mounted in spaced relationship along said one mast from said first wheel means, said second wheel means comprising a first plurality of wheels and a second plurality of wheels, each of said first and second flexible hoist means being trained about ones of said first and second plurality of wheels, and means for adjustably moving said second plurality of wheels relative to said first plurality of wheels said last-mentioned means comprising cover means on said moving means upon which said second plurality of wheels are mounted, said cover means being selectively moveable relative to said first plurality of wheels and urging and maintaining each of said flexible hoist means in contact with a major portion of each of said second plurality of wheels.
Claim 3
Dependent Claim
18 words
The load carrier of claim 1 wherein said first flexible hoist means comprises a pair of flexible members.
Claim 4
Dependent Claim
37 words
The load carrier of claim 1 wherein said first flexible hoist means comprises a pair of chains, said second flexible hoist means are chains and said wheel means comprise a plurality of sprocket wheels engaging said chains.
Claim 5
Dependent Claim
48 words
The load carrier of claim 1 including third and fourth wheel means mounted in spaced relationship along said other mast, said first flexible hoist means being trained about each of said wheel means and said second flexible hoist means being trained about said first and second wheel means
Claim 6
Dependent Claim
51 words
The load carrier of claim 4 wherein one of said wheel means comprises first and second wheels, at least one of said first and second flexible hoist means being trained about said first and second wheels, one of said wheels being adjustably moveable with respect to the other of said wheels.
Claim 7
Dependent Claim
35 words
The load carrier of claim 1 wherein said masts extend above and below said base and each of said flexible hoist means extend above and below said base between each end of their respective masts.
Claim 8
Dependent Claim
33 words
The load carrier of claim 1 wherein said masts extend below said base and said flexible hoist means extend below said base between the lower ends of their respective masts and the base.
Claim 9
Dependent Claim
48 words
The load carrier of claim 1 including means pivotally connecting one of said flexible hoist means to said platform and roller means at the end of said platform opposite said one end, the other of said flexible hoist means comprising a looped member looped about said roller means.
Claim 10
Dependent Claim
61 words
The load carrier of claim 1 wherein said first flexible hoist means comprises a single flexible member, said second flexible hoist means comprises a looped flexible member straddling said single member, a flexible drawing member operatively associated with said drive means, and one end of said single member and both ends of said looped member being attached to said drawing member.
Claim 11
Dependent Claim
244 words
A hoist arrangement for hoisting a rigid load comprising, first flexible hoist means adapted to be connected to one end of the rigid load, second flexible hoist means adapted to be connected to the opposite end of the rigid load, first and third rotatable wheel means, said first flexible hoist means being trained about both of said wheel means and said second flexible hoist means being trained about said first wheel means, drive means for moving said first and second flexible hoist means in one direction to raise the rigid load and in the opposite direction to lower the rigid load between said first and second flexible hoist means, second and fourth wheel means located in vertically spaced relationship with respect to said first and third wheel means, respectively, said first flexible hoist means being trained about each of said wheel means and said second flexible hoist means being trained about said first and second wheel means, fifth rotatable wheel means adjacent said second wheel means, said first and second flexible hoist means being trained about said fifth wheel means, and means for adjustably moving said fifth wheel means relative to said second wheel means, said last-mentioned means comprising cover means upon which said fifth wheel means are mounted, said cover means being selectively moveable relative to said second wheel means and urging and maintaining each of said flexible hoist means in contact with a major portion of each of said fifth wheel means.
Claim 12
Dependent Claim
244 words
A hoist arrangement for hoisting a rigid load comprising, first flexible hoist means adapted to be connected to one end of the rigid load, second flexible hoist means adapted to be connected to the opposite end of the rigid load, first and third rotatable wheel means, said first flexible hoist means being trained about both of said wheel means and said second flexible hoist means being trained about said first wheel means, drive means for moving said first and second flexible hoist means in one direction to raise the rigid load and in the opposite direction to lower the rigid load between said first and second flexible hoist means, second and fourth wheel means located in vertically spaced relationship with respect to said first and third wheel means, respectively, said first flexible hoist means being trained about each of said wheel means and said second flexible hoist means being trained about said first and second wheel means, fifth rotatable wheel means adjacent said second wheel means, said first and second flexible hoist means being trained about said fifth wheel means, and means for adjustably moving said fifth wheel means relative to said second wheel means, said last-mentioned means comprising cover means upon which said fifth wheel means are mounted, said cover means being selectively moveable relative to said second wheel means and urging and maintaining each of said flexible hoist means in contact with a major portion of each of said fifth wheel means.
Claim 13
Dependent Claim
18 words
The hoist arrangement of claim 10 wherein said second flexible hoist means straddles said first flexible hoist means.
Claim 14
Dependent Claim
18 words
The hoist arrangement of claim 11 wherein said first flexible hoist means comprises a pair of flexible members.
Claim 15
Dependent Claim
37 words
The hoist arrangement of claim 11 wherein said first flexible hoist means comprises a pair of chains, said second flexible hoist means are chains and said wheel means comprise a plurality of sprocket wheels engaging said chains.
Claim 16
Dependent Claim
50 words
The hoist arrangement of claim 10 including sixth rotatable wheel means adjacent at least one of said third and fourth wheel means, said first flexible hoist means being trained about all of said wheel means, said sixth wheel means also being selectively moveable with respect to its adjacent wheel means.
Claim 17
Dependent Claim
70 words
The hoist arrangement of claim 10 wherein said first wheel means comprise a pair of rotatable shafts having wheels thereon, one of said shafts being located in a plane above said second wheel means and the other of said shafts being located in a plane below said second wheel means, and said third and fourth wheel means being located in substantially the same plane as each of said shafts, respectively.
Claim 18
Dependent Claim
61 words
The hoist arrangement of claim 10 wherein said first flexible hoist means comprises a single flexible member, said second flexible hoist means comprises a looped flexible member straddling said single member, a flexible drawing member operatively associated with said drive means, and one end of said single member and both ends of said looped member being attached to said drawing member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |